glaucophane

Glaucophane is a mineral and a mineral group belonging to the sodic amphibole supergroup of the double chain inosilicates, with the chemical formula Na2(Mg3Al2)Si8O22(OH)2.

Key facts

Mineral.name: Glaucophane
Mineral.category: Inosilicates Sodic amphibole group
Mineral.image: Glaucophane bleu de Groix.jpg
Mineral.imagesize: 260px
Mineral.caption: Glaucophane with fuchsite (white oval)
Mineral.formula: ☐Na2(Mg3Al2)Si8O22(OH)2
Mineral.IMAsymbol: Gln
Mineral.strunz: 9.DE.25
Mineral.system: Monoclinic
Mineral.class: Prismatic (2/m) (same H-M symbol)
Mineral.symmetry: C2/m
Mineral.habit: slender long prisms, Massive granular to columnar
Mineral.cleavage: Good on [110] and on [001]
Mineral.fracture: Brittle – conchoidal
Mineral.mohs: 6.0–6.5
Mineral.luster: Vitreous – pearly
Mineral.streak: Grayish blue
Mineral.diaphaneity: Translucent

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Wikidata facts

Image: Glaucophane bleu de Groix.jpg

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Nickel-Strunz '10th ed', review of (9th ed/ 2009 update): 9.DE.25
Commons category: Glaucophane
Nickel-Strunz 9th edition (updated 2009): 9.DE.25
IMA Mineral Symbol: Gln
chemical formula: ☐Na₂(Mg₃Al₂)Si₈O₂₂(OH)₂
Strunz 8th edition (series ID, updated): VIII/D.05d

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Contents

Name
Characteristics
Occurrence
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Glaucophane is a mineral and a mineral group belonging to the sodic amphibole supergroup of the double chain inosilicates, with the chemical formula Na2(Mg3Al2)Si8O22(OH)2.

Glaucophane crystallizes in the monoclinic system.